When the move Curse was used in battle, the screen would cut to black. Just like the Ghosts in Lavender Tower, defending Pokemon were unable to attack Ghost - it would only say they were too scared to move.
I know there’s a real move with that name, but it didn’t exist in Generation 1, so it appears to have been hacked in. The Pokemon was level 1 and had the sprite of the Ghosts that are encountered in Lavender Tower prior to obtaining the Silph Scope. If you looked at your Pokemon after selecting your starter, you had another Pokemon in addition to Bulbasaur, Charmander, or Squirtle: “GHOST”. It quickly became evident that the game was essentially a slightly-altered version of Pokemon Red. Upon selecting “New Game”, the game started with the Professor Oak speech. It also said “Black Version” under the logo. Red was there, but there were no Pokemon cycling through next to him. However, the “press start” screen had been altered. The game started with the familiar Nidorino and Gengar intro of Red and Blue. Unfortunately, I lost the game when I moved years ago, so I can’t provide you with a ROM or any screenshots. Here’s a picture of the cartridge, in case anyone recognizes it.
